AS135555: the CITYCOMMS-AS-AP City Communications PTY LTD network

AS135555 is an internet Autonomous System operated by CITYCOMMS-AS-AP City Communications PTY LTD (Australia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS135555?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS135555 was assigned to CITYCOMMS-AS-AP City Communications PTY LTD by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS135555 currently announces 2 IPv4 block(s), totaling 768 addresses (768 in all), registered in Australia. Services from CITYCOMMS-AS-AP City Communications PTY LTD are reached through these addresses.

What it means to see AS135555 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS135555. That means the other end sits on the CITYCOMMS-AS-AP City Communications PTY LTD network (Australia). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.